Dishwashing machine



Dec. 13, 1932. w. 1 LINDGREN 1,890,520

DISHWASHING MACHINE Filed May s1. 195o Smeets-sheet 1 BAN ,NN mw.

VIR. W

Dec. 13, 1932. w. L. LINDGREN DISHWASHING MACHINE Filed May 51, 1930 3 Sheets-Sheet 2 Dec. 13, 1932. A w. L. LINDGREN DISHWASHING MACHINE Filed May 3l 3 Sheets-Sheet 3 Patented Dec. 13, 1932 UNITE ASTATES rA'rENr 4orrlcr. f

`W'ALZDEIVIARL. LINDGREN, OF WAUKEGAN, ILLINOIS, ASSIGNOR OF ONE-HALF TO TOI-IN E. ERICSSON, F CHICAGO, ILLINOIS `DISHAS-IINGr MACHINE Application led May 31,

cation No. 417,056, filed December 28, 1929,V

and is designed to produce a dish washer of the type therein shown that can be more readily removed from or placed in the sink in which it is intended to be operated.

In the dish-washing machine shown in the aforesaid application, an endless skeleton conveyor or carrier is employed, and the pipes for washing the under surfaces spra `of the dishes have to extend horizontally transversely of the conveyor and beneath the upper and lower halves thereof, with the result that when it is to be removed and replaced.,` the conveyor has to be moved substantially horizontally away from or toward,

"as the oase may be, the rear of the sink, which is an awkward and difhcult movement.

By my present invention, I combine with the `removable frame a Vconveyor that has'no under run, and produce a device in which the frame and conveyor can be lifted substantially vertically in removing them from the sink,\and likewise similarly lowered in replacing them.

To illustrate my invention, I annex hereto i three sheets of drawings', in which the same reference characters are vused to designate identical parts inall the figures, of which,

Fig. 1 is a front elevation, partly in section,I on the line 1 1 of Fig. 2;

Fig. 2 is a plan view in section on the line 2 2 of Fig. 1, but on a somewhat larger scale.

Fig. 3 is a vertical section on the line 3 3 of Fig. 1; l

Fig. 4 is a detail in section. on the line 4 4 `of Fig. 3;

Fig. 5 isa detail of a port-ion of the mech` anism and Fig. 6 is a much enlarged detail of a portion of the mechanism shown in Fig. 1.

As in my prior application, l propose to use the dishwashing machine in a sink 10, which will be provided with tne customary shown in Fig. 1, slightly modified;

hot and cold water pipes 11 and 12, which have on their inner ends the connections 13 and 14 to a. mixer 15, which has the valves 1930. 4Serial No. 458,346.

16 and 17 by which the temperature of the l water flowing from the spout 18 can be regulated. The spout 18 is swiveled in the connection 19 to the mixer 15 so that it can be swung horizontally into the position shown in dotted lines in Fig. 1, where the water is l cut ofi", or it can be swung horizontally to a position extending out into the sink when it is desired to use the sink with the dishwashing machine removed. The connection 19rhas extending downward therefrom the pipes 20 and 21, whichat their lower ends are provided with connections, not lettered, with the vertical pipes 22 and 23, which are secured for support to the mixer 15 by the brackets 24 and 25, seen in Fig. 2, which are connected by screws with the lugs 26 and 27 extending upwardly from the ends of the mixer. These pipes also have extending outwardly therefrom at a lower level, as seen in Fig. 3,'the brackets 28, which co-operate with the removable framework, as hereinafter .described. The lower ends of the pipes 22 and 23 have swiveling connections with the pipes 29 and 30, and at their upper ends have simif nected, respectively, with the `soap holders 33 and 34, which have formed on their lower and upper sides, respectively, the spray pipes 35 and 36 for the soapy water, these soap holders Vand connected pipes being constructed as shown and claimed in my `prior application No. 397,200, filed Octoberv 4, 1929. Projecting upward from the center of the mixer 15 is a standard 37, on the upper end of which is secured the bracket 38, which, together with the brackets 39,seen in Fig. 3 and secured to the pipes 22 and 23, serve to support the electric motor 40, the armature shaft 41 of which is connected by suitable reducing gearing in the casing 42 with the shaft 43 extending downwardly to thecasing 44,

seen in Figs. 2, 3 and 4, containing reducing gearing by which the shaft 43 is connected with a short horizontal shaft having the clutch member 45 on its outer end. The object of the motor is to drive the gearing of the conveyor to be subsequently described, and it will be understood that the details of all the mechanism heretofore described are more fully disclosed and claimed in my applications Nos. 323,876, filed December 5, 1928, and 417,056, filed December 28, 1929.

Coming now to the conveying mechanism for passing the dishes between the spray members heretofore described, the framework is made up of a pair of side members 46 and 47, connected at their ends by the transverse brackets 48 and 49, seen in Figs. 1 and 2, the upper horizontal portions of these brackets constituting tables, as it were, over which the dishes pass in entering and leaving the machine. These brackets are, respectively, provided at their ends with down-V wardly projecting webs and 51, which are connected by the vertical cross pieces 52 and 53, which, with the portions 48 and 49, serve to tie the two halves of the frame together. The frame is supported'in the sink at its forward end by the pair of brackets 54, seen in Figs. 2 and 3, secured to the splash plate 55 secured to the lower side of the side piece 47 and extending the length of the frame `down into the sink far enough to prevent any ofthe Water being used in the washing machine from splashingout from the lower end thereof over the edge of the sink. The rear side is supported by the lugs 56 projecting rearwardly from the top of the gear casing 57 and provided with apertures therein to receive the lugs 58 projecting upwardly from kthe ends of the brackets 28 previously described. f

The clutch member is adapted to engage the co-operating clutch member 59 secured on the short shaft 60 journaled in bearings formed in the lower portion of the kgear casing 57 and of the side piece 46, so that by moving the framework outwardly enough to disengage the clutch members 45 and 59, the entire framework can be lifted upward to remove it from the sink. The shaft 60 has secured thereon within the gear casing the sprocket wheel 61, with which meshes the sprocket chain 62, which is preferably held in contact therewith for a few more degrees by the roller 63, seen in Fig. 4 as journaled in l the gear casing. The sprocket chain engages the plurality of sprocket wheels 64 arranged in a horizontal line on the shafts 65 jcurnaled in bearings formed in the side pieces 46 and and 47 and in the gear casing 57. Between the side pieces 46 and 47 each shaft is provided with a roller 66, which rollers, except directly above the spray members 30 and 36, have journaled between them thesmall idler rollers 67 in suitable bearings in the side pieces 46 and 47, and with their upper surbers 30 and 36 is left so that the spray shoot ing upward therefrom to engage the under side of the dishes passing over the carrier will not be interrupted by the rollers. Inasmuch as the machine is also adapted to wash knives and forks and spoons, l preferably bridge the gap existing over the spray members 30 and 36 by the wire screens 69, which are on the same level or slightly below the level of the tops of the rollers 66 and 67, and are preferably constructed of fine wire, but with a large mesh so as to offer as little resistance to the passage of the water as possible, while at the same time preventing the cutlery from possibly falling between the rollers in case it should get turned around from the longitudinal position which it should assume in passing through the conveyor. The wire mesh 69 will, of course, be reinforced at its edges bv wire rods substantially in contact with the adjacent surfaces of the adjacent rollers 66. Where the knives and forks are to be delivered automatically,

'they will have to besent through the machine parallel to the rollers, and th-e bridge 68, which it will be noted is hinged at 70, will have to be turned up into the dotted-line position shown, and the cutlery will pass from the last roller 66 on to the inclined stationary bridge piece 71, which constitutes the upper edge of the sheet-metal trough 72 secured to the end piece 53 for the purpose of receiving the cutlery.

To prevent the water splashing from the upper portion of the apparatus, I provide the cover 72, which is made of sheet-metal rear and front pieces, as seen in section in Fig. 2, and with the sheet-metal top connectingthese front pieces, the sheet-metal being stiffened at the edges of the inverted rectangular trough thus formed by the wires 73 around which the edges are coiled. The ends of the cover are formed by the flexible chains 7 4, which are preferably of the structure shown in the companion application` No. 458,345. filed herewith. The sprav members 32 and 35 are, of course, located above the horizontal lil-O employed, it will be necessary to remove the cover by a horizontal movement, and to permit this, the cover is held in place by the Ujshaped clips 79 formed at each corner and pivoted in the lugs 80 projecting upward from the side pieces, so that when the clips 79 are turned up to a position at right angles to that shown, the cover will be freed from the frame proper and can be slid horizontally toward the front, and thus removed.

Instead of employing the inverted slotted troughs 77, shown in Fig. 1, I may use the construction shown in Fig. 5, where it will be seen that the troughs are dispensed with, and the horizontal flanges on the bottom of the spray members 32 and 35 are widened out and preferably provided with the rubber extensions 81, shown in Fig. 5, which make the flanges wide enough to cover the slots 7 5 and 76, and do not prevent the spray members 32 and 35 being swung `horizontally to a position parallel with the rear of the sink, where they do not prevent the framework with the cover in place being lifted upward, the only limitation being that the frame will have to be lifted upward and forwardly enough so as to avoid the bracket 38, seen in Fig. 3.

The operation of the apparatus will now be readily understood and further description thereof is deemed unnecessary.

While I have shown and described my imrovements as embodied in the form which at present consider best adapted to carry out its purposes, it will be understood that they are capable of modification, and that I do not desire to be limited in the interpretation of the following claims except as may be necessitated by the state of the prior art.

What I claim as new, and desire to secure by Letters Patent of the United States, is:

1. In a dish-washing machine, the combination with a framework adapted to be placed in a sink, of a series of rollers journaled therein and extending transversely thereof, spray pipes connected with the sink faucets and adapted to extend transversely of said framework parallel to the rollers, and driving means to rotate said rollers in the same direction to carry the dishes from one end of the frame to the other and between the spray pipes, said series consisting of some large positively-driven rollers having the same diameter throughout and extending entirely across the inside of the framework with siniilar only smaller intermediate idle rollers, all of said rollers having their uppermost surfaces in the same plane.

2. In a dish-washing machine, the combination with a framework adapted to be placed in a sink, of a series of rollers journaled therein and extending transversely thereof, spray pipes connected with the sink faucets and adapted to extend transversely of said framework parallel to the rollers, and driving means to rotate said rollers in the same direction to carry the dishes from one end of the frame to the other and between the spray pipes, said rollers being spaced apart more widely directly above the spray pipes beneath them and coarse-mesh wire screens being placed between the spacednapart rollers directly over the spray pipes.

3. In a dish-washing machine, the combination with a framework adapted to be placed in a sink and removable therefrom at will, of a series of rollers journaled therein and extending transversely thereof, swinging spray pipes connected with the sink faucets and adapted to extend transversely of said framework parallel to the rollers or to be swung out of the way in a position parallel to the rear wall of the sink, driving means to rotate said rollers in the same direction to carry the dishes from one end of the frame to the other and between the spray pipes, and a cover secured to the framework and beneath which the dishes pass, said cover having transverse slots in the top thereof for the passage of the downward sprays, and the upper spray pipes having lateral extensions wide enough to cover the slots when the spray pipes are in position for operation.

In witness whereof, I have hereunto set my hand this 24th day of May, 1930.

VALDEMAR L. LINDGREN.

llO 

